ruler
tracing paper
those are the wrong answers its Straightedge & Compass
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A straightedge and compass.
Plato believed that the only tools needed for geometric calculations was a compass and a ruler. The type of compass being the type with a pencil attached to a pointing device.
The Cartesian coordinate system allows a geometric curve to be described in algebraic terms. This then allows the use of algebraic tools including differentiation and integration to be used to solve geometric problems such as the turning points of curves, their volumes of rotation and so on. It also enables geometric methods to be applied to solving algebraic problems.
statistical tools under parametric
What tools did scientists use to look in to elements before they had the right kind of tools